While information about your File Uploads contained in your File Manager is not contained in the Blogware XML export file, all of your files are accessible via FTP and that's the easiest way to retrieve them.

The files contained in the top directory of your FTP site were accessible at the root directory of your Blogware blog; so if you had a file at the top level of the FTP site named mypicture.jpg and your site had a URL of www.blogharbor.com, the file's URL was http://www.blogharbor.com/mypicture.jpg .

So you can just download the contents of your FTP site and upload the contents to the root directory of your new site.